EP1999984B1 - Verfahren für die zuweisung einer mobilen einheit eines verfolgungsbereichs auf der basis einer standortaktualiserungsfrequenz - Google Patents

Verfahren für die zuweisung einer mobilen einheit eines verfolgungsbereichs auf der basis einer standortaktualiserungsfrequenz Download PDF

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Publication number
EP1999984B1
EP1999984B1 EP07753154.9A EP07753154A EP1999984B1 EP 1999984 B1 EP1999984 B1 EP 1999984B1 EP 07753154 A EP07753154 A EP 07753154A EP 1999984 B1 EP1999984 B1 EP 1999984B1
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EP
European Patent Office
Prior art keywords
mobile unit
tracking area
technology
shared
location update
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Not-in-force
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EP07753154.9A
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English (en)
French (fr)
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EP1999984A1 (de
Inventor
Alessio Casati
Sudeep Kumar Palat
Said Tatesh
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Nokia of America Corp
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Alcatel Lucent USA Inc
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Priority to PL07753154T priority Critical patent/PL1999984T3/pl
Publication of EP1999984A1 publication Critical patent/EP1999984A1/de
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W40/00—Communication routing or communication path finding
    • H04W40/24—Connectivity information management, e.g. connectivity discovery or connectivity update
    • H04W40/248—Connectivity information update
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W60/00—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
    • H04W60/04—Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration using triggered events
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Definitions

  • This invention relates generally to communication systems, and, more particularly, to wireless communication systems.
  • the coverage area of a wireless communication system is typically divided into a number of cells, which may be grouped into one or more networks.
  • Mobile units located in each cell may access the wireless communications system by establishing a wireless communication link, often referred to as an air interface, with a base station associated with the cell.
  • the mobile units may include devices such as mobile telephones, personal data assistants, smart phones, Global Positioning System devices, wireless network interface cards, desktop or laptop computers, and the like.
  • the mobile unit may periodically provide location update messages that inform the wireless communication system of the mobile unit's current location.
  • the wireless communication system may use the information in the location update messages to locate the mobile unit ( e.g., by paging the mobile unit) and then direct information to the mobile unit via a base station indicated when the mobile unit responds to the page.
  • the mobile unit may not send location update messages even though it may continue to move through the cells in the wireless communication system, until some condition is met (e.g., when the mobile unit crosses the boundary of the tracking area associated with the last location update message, a new location update with the new tracking area is sent). Accordingly, the wireless communication system may not know the exact cell that includes the mobile unit when information becomes available for delivery to the mobile unit.
  • the wireless communication system may attempt to reach the mobile unit by sending paging messages over a plurality of cells belonging to a paging area determined by the network based on the information it has about the last known mobile unit location. For example, the wireless communication system may attempt to reach the mobile unit by sending paging messages to the cells belonging to the last known tracking area.
  • the paging messages contain information that indicates to the mobile unit that information is available for transmission to the mobile unit. If the mobile unit receives the paging message, it may provide a paging response via a base station that provides wireless connectivity to the cell that includes the base station.
  • the paging response typically indicates that the mobile unit is available to receive the information and also provides information indicating how to route the information to the mobile unit.
  • Both the paging messages and the location update messages represent system overhead. Accordingly, the wireless communication system is generally designed to meet two conflicting objectives: reducing the overhead from the paging load and reducing the number of location update messages transmitted by the mobile unit.
  • the paging load is typically minimized when the location of the mobile unit is known with relatively high granularity so that each paging message can be transmitted to a relatively smaller number of cells.
  • increasing the granularity of the location of the mobile unit requires transmitting a larger number of location update messages.
  • reducing the number of location update messages transmitted by the mobile unit may reduce the granularity of the location information used by the wireless communication system to locate the mobile unit, which typically results in each paging message being transmitted to a relatively large number of cells.
  • the conventional solution to this problem is to define tracking areas that include the cells serviced by a plurality of base stations.
  • the mobile units may then transmit location update messages when they cross from one tracking area to another tracking area and the wireless communication system may begin the paging process by providing paging messages via the base stations in the tracking area indicated by the most recently received location update message.
  • the geographic area served by the wireless communication system may be divided up into multiple tracking areas that encompass the cells serviced by groups of 10 base stations.
  • Mobile units in the wireless communication system may then provide location updates when they cross a cell boundary between the groups of 10 base stations and the wireless communication system may provide paging messages via the groups of 10 base stations in the tracking areas.
  • Conventional tracking areas may be static, i . e ., the association of tracking areas to base stations remains constant over time, or dynamic, i . e ., the wireless communication system may modify the tracking areas associated with a mobile unit.
  • an entity such as a radio network controller, in a wireless communication system that implements dynamic modification of the tracking areas may determine a distance that the mobile unit has traveled between successive location update messages. If the mobile unit has moved a relatively large distance, the radio network controller may increase the size of the tracking area associated with the mobile unit to include a larger number of base stations. Conversely, if the mobile unit has moved a relatively small distance, the radio network controller may decrease the size of the tracking area.
  • Conventional wireless communication systems may also dynamically adjust the size of tracking areas based on a velocity of the mobile unit.
  • each radio network controller may need to acquire, store, and manipulate information indicating at least the current and previous locations of each mobile unit served by the radio network controlled, as well as the size and/or constituent base stations of the tracking areas associated with each mobile unit served by the radio network controller.
  • Mobile units may also be able to support multiple modes that permit the mobile units to access different wireless communication technologies.
  • a first technology may be used to provide wireless connectivity over a first area and a second technology (e.g., a new or updated technology) may be used to provide wireless connectivity over a second area that overlaps with a portion of the first area.
  • a second technology e.g., a new or updated technology
  • the mobile unit may encounter areas where the environmental and/or radio conditions cause the mobile unit to move between the different technologies, which may cause the mobile unit to transmit location update messages.
  • the proliferation of different wireless communication technologies, as well as the increasing market demand for access to these technologies is expected to result in an increase in the number of multimode mobile units that can access multiple technologies. Consumers will also expect the multimode mobile units to move seamlessly across multiple technologies.
  • the present invention is directed to addressing the effects of one or more of the problems set forth above.
  • the following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. This summary is not an exhaustive overview of the invention. It is not intended to identify key or critical elements of the invention or to delineate the scope of the invention. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is discussed later.
  • a method for assigning a mobile unit to a tracking area based upon a location update frequency.
  • the method includes selecting one of a technology-specific tracking area and a shared tracking area based on a location update frequency associated with a mobile unit.
  • the software implemented aspects of the invention are typically encoded on some form of program storage medium or implemented over some type of transmission medium.
  • the program storage medium may be magnetic (e.g., a floppy disk or a hard drive) or optical (e.g., a compact disk read only memory, or "CD ROM"), and may be read only or random access.
  • the transmission medium may be twisted wire pairs, coaxial cable, optical fiber, or some other suitable transmission medium known to the art. The invention is not limited by these aspects of any given implementation.
  • Figure I conceptually illustrates a first exemplary embodiment of a wireless communication system 100.
  • a plurality of base stations 105 (only one indicated in Figure 1 ) provide wireless connectivity to a corresponding plurality of geographic areas or cells (not shown).
  • base stations 105 are used to provide wireless connectivity in the first exemplary embodiment of the wireless communication system 100, persons of ordinary skill in the art having benefit of the present disclosure should appreciate that the present invention is not limited to base stations 105.
  • base station routers, access networks, access points, and the like may also be used to provide wireless connectivity.
  • the base stations 105 may provide wireless connectivity to one or more mobile units 110.
  • a single mobile unit 110 is depicted in Figure 1 .
  • Exemplary mobile units may include, but are not limited to, cellular telephones, personal data assistants, smart phones, pagers, text messaging devices, network interface cards, notebook computers, desktop computers, and the like.
  • the terms "wireless communication system” and/or “wireless communication network” will be understood to refer to the base stations 105 and any other entities or devices that may be used to provide wireless connectivity to the mobile units 110.
  • the mobile units 110 will be understood to be distinct and separate from the wireless communication system 100.
  • the base stations 105 may implement one or more of a plurality of technologies.
  • the term "technology” will be understood to refer to a set of standards and/or protocols that, when implemented in the wireless communication system 100 and the mobile units 110, enable a wireless communication system 100 and the mobile units 110 to communicate.
  • the Universal Mobile Telecommunication System (UMTS) and the Global System for Mobile communication (GSM) are examples of wireless communication technologies. Different releases of sets of standards and/or protocols may also constitute different technologies. However, individual standards or protocols that are defined by systems such as UMTS or GSM may or may not constitute separate technologies, depending on whether or not the individual standards or protocols may independently enable communication between a wireless communication system 100 and the mobile units 110.
  • the mobile units 110 are multiple mode mobile units 110 that are capable of accessing the wireless communication system 100 via a plurality of technologies.
  • the mobile units 110 may be dual-mode mobile units 110 other capable of accessing the wireless communication system 100 using either UMTS or GSM.
  • UMTS Universal Mobile Telecommunication
  • GSM Global System for Mobile communications
  • the present invention is not limited to dual-mode mobile units 110 that implement UMTS and GSM.
  • the mobile units 110 may be capable of operating in any number of modes to access the wireless communication system 100 using any number of wireless communication technologies.
  • the wireless communication technologies implemented by the mobile units 110 are matters of design choice and not material to the present invention.
  • the base stations 105 are grouped into tracking areas 115(1-5), 120(1-3), 125, 130 that include the geographic areas served by the constituent base stations 105.
  • the indices (1-5) and (1-3) may be dropped when referring to the tracking areas 115, 120, collectively. However, these indices may be used to indicate individual tracking areas 115, 120 or subsets thereof. This convention may also be applied to other groups of elements indicated by a single number and an associated plurality of indices.
  • the tracking areas 115, 120, 125 are associated with a particular wireless communication technology.
  • base stations 105 in the tracking areas 115, 120, 125 may implement UMTS.
  • the tracking area 130 is associated with a different wireless communication technology.
  • base stations 105 in the tracking area 130 may implement GSM. Accordingly, the tracking areas 115, 120, 125, 130 may be referred to as technology-specific tracking areas 115, 120, 125, 130.
  • the mobile unit 110 selects or is assigned to one of the tracking areas 115, 120, 125, 130.
  • Information indicating the identities of the tracking areas 115, 120, 125, 130 associated with the cell (or cells) that are providing wireless connectivity to the mobile unit 110 may be provided to the mobile unit 110, e . g ., by broadcasting a message that contains this information.
  • the mobile unit is initially assigned to the tracking area 115(1), which is associated with the first technology. Accordingly, if information destined for the mobile unit 110 becomes available, the wireless communication system 100, or an entity therein such as a radio network controller (not shown), may attempt to locate the mobile unit 110 by providing one or more paging messages via the base stations 105 located within the tracking area 115(1).
  • the term "paging message" will be understood to refer to any message transmitted to the mobile unit 110 to indicate that the wireless communication system 100 would like to establish communications with the mobile unit 110.
  • the mobile unit 110 may roam from the initial tracking area 115(1) into other tracking areas such as the tracking area 115(2), which is also associated with the first technology, as indicated by the arrow 135.
  • the mobile unit 110 may be configured to provide a location update message when the mobile unit 110 crosses a boundary between the initial tracking area 115(1) and the tracking area 115(2).
  • Some wireless communication protocols define a particular Location Update message having a particular format and including certain predetermined types of information.
  • the term "location update message" will be understood to refer to any message transmitted by the mobile unit 110 that contains information that may be used, e . g ., by the wireless communication system 100, to determine a location of the mobile unit 110.
  • the wireless communication system 100 may use the location update message to determine that the mobile unit 110 is in the tracking area 115(2).
  • the mobile unit 110 or an entity/node (not shown in Figure 1 ) in the wireless communication system 100 may determine a location update frequency associated with the mobile unit 110 as it roams through the wireless communication system 100.
  • a timer (not shown) may be used to count down (or count up) for a predetermined time period. The number of location update messages transmitted while the timer is counting down (or counting up) may be counted. The location update frequency may then be determined by dividing the total number of location update messages by the predetermined time period. For example, if the predetermined time period is approximately 1 minute and 10 location update messages are transmitted during that time, then the location update frequency is approximately 10 per minute.
  • separate timers and/or location update frequencies may be associated with each of the tracking areas 115, 120, 125, 130.
  • a tracking area 115, 120, 125 may then be selected or determined based on the location update frequency associated with the mobile unit 110.
  • the mobile unit 10 may be assigned to one of the small tracking areas 115.
  • the location update frequency may be above a selected threshold level and the mobile unit 110 therefore be assigned to one of the relatively larger tracking areas 120. If the location update frequency subsequently falls below another selected threshold level, the mobile unit 110 may be reassigned to a smaller tracking area 115. However, if the location update frequency remains high (or increases) the mobile unit 110 may be reassigned to a yet larger tracking area 125.
  • the mobile unit 110 may roam from the tracking area 115(2) associated with the first technology into tracking areas associated with a different technology, such as the tracking area 130, which is associated with a second technology such as GSM, as indicated by the arrow 140.
  • the mobile unit 110 may be configured to provide a location update message when the mobile unit 110 crosses a boundary between the tracking area 115(2) associated with the first technology and the tracking area 130 associated with the second technology.
  • the tracking area 130 associated with the second technology overlaps portions of various tracking areas 115, 120, 125 associated with the first technology.
  • the mobile unit 110 may be able to access the wireless communication system 100 via either the first or the second technology.
  • Movement of the mobile unit 110 changing environmental conditions, variations in radio transmission characteristics, coverage holes, and other factors may result in the mobile unit 110 switching between the first and second technologies and/or the tracking areas 115, 120, 125, 130.
  • the mobile unit 110 may transmit a relatively large number of location update messages in response to the transitions between the tracking areas 115, 120, 125 associated with the first technology and the tracking area 130 associated with the second technology.
  • the mobile unit 110 may therefore be assigned to a shared tracking area (not shown in Figure 1 ) that encompasses portions of the technology-specific tracking areas 115, 120, 125, 130.
  • the term "shared tracking area" will be understood to refer to a tracking area that encompasses geographical areas served by base stations 105 that provide wireless connectivity within portions of the shared tracking area according to at least two different technologies.
  • FIG. 2 conceptually illustrates a second exemplary embodiment of a wireless communication system 200.
  • the wireless communication system 200 includes base stations 205, 210 that provide wireless connectivity to corresponding geographic areas 215, 225 according to first and second technologies, respectively.
  • the geographic areas 215, 225 shown in Figure 2 correspond to technology-specific tracking areas associated with the first and second technologies.
  • the geographic areas 215, 225 may not necessarily correspond exactly to a tracking area.
  • the technology-specific tracking areas associated with the first and second technologies may encompass a larger area and/or more base stations than shown in Figure 2 .
  • a mobile unit 230 is initially located in an overlapping region associated with both of the technology-specific tracking areas 215, 225.
  • the mobile unit 230 is a multiple mode device that may access the wireless communication system 200 using either the first or the second technology when located in the overlapping region.
  • changing environmental conditions, channel qualities, coverage holes, and the like may result in the mobile units 230 switching between the first and second technologies. Variations in these conditions may also result in the boundaries of the technology-specific tracking areas 215, 225 sweeping back and forth across the location of the mobile unit 230.
  • the mobile unit 230 may move from the overlapping region into a region associated exclusively with the technology-specific tracking area 225, as indicated by the arrow 235. These events, and other like events, may trigger transmission of a location update message by the mobile unit 230.
  • a location update frequency associated with transitions between the technology-specific tracking areas 215, 225 may be determined.
  • the mobile unit 230 determines the location update frequency associated with the transitions between the technology-specific tracking areas 215, 225. For example, the mobile unit 230 may initiate a timer in response to transmitting a location update message triggered by a transition between the technology-specific tracking areas 215, 225. The timer may have a predetermined duration and the mobile unit 230 may count or record the number of location update messages triggered by transitions during the predetermined duration of the timer. The mobile unit may then determine the location update frequency by dividing the number of location update messages by the duration of the timer.
  • a common node 240 shared by portions of the wireless communication system 200 that implement the first and second wireless communication technologies may also be used to determine the location update frequency associated with transitions between the tracking areas 215, 225.
  • the base station 205 may be coupled to a controller 245 (such as a radio network controller) which may be communicatively coupled to the common node 240.
  • the base station 210 may be coupled to another controller 250 such as a radio network controller, which is also communicatively coupled to the common node 240.
  • the common node 240 may receive signals or information in response to location update messages associated with transitions between the technology-specific tracking areas 215, 225 and may use this information to determine a location update frequency associated with transitions between the technology-specific tracking areas 215, 225.
  • the common node 240 has been described herein as a separate entity, persons of ordinary skill in the art having benefit of the present disclosure should appreciate that the common node 240 does not necessarily need to be implemented as a separate entity.
  • the common node 240 may be implemented in one of the base stations 205, 210 using appropriate signaling supported by the interface between the base stations 205, 210.
  • the common node 240 may keep track of the number of transitions the mobile unit 230 makes between the two technology-specific tracking areas 215, 225.
  • the common node 240 may retain a record of the previous registrations of the users for a period of time that is configurable.
  • the common node 240 may implement a timer similar to the timer discussed above.
  • the common node 240 may also keep track of the tracking areas 215, 225 visited by the mobile units 230 to determine whether or not the mobile unit 230 is switching back and forth, or "ping-pong-ing," between the same two tracking areas 215, 225.
  • the new system may contact the old one when the mobile unit 230 moves from one to the other so that the systems may exchange information that may be used to keep track of the tracking areas 215, 225 visited by each mobile unit 230.
  • the common node 240 may also include functionality for providing paging messages to the mobile unit 230.
  • the mobile unit 230 may be assigned to a shared tracking area 255 based on the location update frequency associated with transitions between the technology-specific tracking areas 215, 225. In embodiments in which the mobile unit 230 determines the location update frequency, the mobile unit 230 may provide a reassignment request message to the wireless communication network 200 indicating that it should be assigned to the shared tracking area 255. For example, the mobile unit 230 may provide the reassignment request message when the number of transitions between two systems exceeds a configurable threshold in a given period of time. The wireless communication network 200 may then assign the mobile unit 230 to the shared tracking area 255 in response to receiving the reassignment request message. In embodiments in which the common node 240 determines the location update frequency, the wireless communication network 200 may assign the mobile unit 230 to the shared tracking area 255 and then provide a message indicating the assignment to the mobile unit 230.
  • the wireless communication system 200 may page the mobile unit 230 by providing a paging message via some or all of the cells shared tracking area 255.
  • the wireless communication network 200 may transmit paging messages according to the first and second technologies using the base stations 205, 220.
  • the common node 240 may be notified when the mobile units 230 moves to an idle (or paging) state so that the common node 240 can initiate the paging in all systems of the shared tracking area 255.
  • the mobile unit 230 may be provided with paging identities for the systems associated with the shared tracking area 255 if these systems are different.
  • the mobile unit 230 may also be reassigned to a technology-specific tracking area 215, 225 after being assigned to the shares traffic area 255. In one embodiment, the mobile unit 230 may be reassigned to one of the technology-specific tracking areas 215, 225 after a selected time if the mobile unit remains within a specific technology without changing to the other technology. For example, a "cooling off" timer may be implemented in either the mobile unit 230 or the common node 240.
  • the cooling-off timer may be used to decide when the mobile unit 230 may be reassigned to the technology-specific tracking area 215, 225, e.g., by starting the timer when the mobile unit 230 is assigned to the shared traffic area 255 and then triggering reassignment to one of the technology-specific tracking areas 215, 225 after the cooling-off timer has counted up (or counted down) to a predetermined time and the mobile unit remains within a specific technology without changing to the other technology.
  • separate cooling off timers may be associated with different technology-specific tracking areas 215, 225 and the mobile unit 230 may be reassigned to the technology-specific tracking area 215, 225 associated with the cooling-off timer, when the associated cooling-off timer reaches the predetermined duration.
  • FIG. 3 conceptually illustrates one exemplary embodiment of a method 300 of assigning mobile units to shared tracking areas.
  • a location update frequency associated with transitions between technology-specific tracking areas may be determined (at 305). For example, is a mobile unit or a common node within the network may determine (at 305) the location update frequency associated with the transitions. Whether or not the location update frequency is above a threshold value (T1) may then be determined (at 310). If the location update frequency is above the threshold value, then the mobile unit may be assigned (at 315) to a shared tracking area. For example, the mobile unit may request assignment to a shared tricking area and the wireless communication system may assign (at 315) the mobile unit to the shared tracking area.
  • T1 threshold value
  • the wireless indication system may assign (at 315) the mobile unit to the shared tracking area and may then notify the mobile unit of the assignment. However, if the location update frequency is not above the threshold value, the mobile unit may remain (at 320) in the current technology-specific tracking area.
  • the various thresholds used to select the technology-specific tracking areas and/or the shared tracking areas may be modified as necessary.
  • operators may flexibly configure systems to reduce or minimize location update and paging load due to intersystem mobility in idle mode.
  • This approach can apply to many potential architectural options, and depending on the one it applies to, the same benefits/drawbacks may apply with the advantage of being able to flexibly page on one or both technologies depending on the coverage patterns and the behaviour of the mobile unit(s).

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Claims (11)

  1. Verfahren zur Implementierung in einem drahtlosen Kommunikationssystem mit ersten Basisstationen (205), welche gemäß einer ersten Technologie betrieben werden und mindestens einem ersten technologiespezifischen Verfolgungsbereich (215) zugeordnet sind, und zweiten Basisstationen (210), welche gemäß einer zweiten Technologie, die sich von der ersten Technologie unterscheidet, betrieben werden und mindestens einem zweiten technologiespezifischen Verfolgungsbereich (225) zugeordnet sind, wobei das Verfahren GEKENNZEICHNET IST DURCH:
    Erfassen eines Übergangs einer mobilen Einheit (230) zwischen dem besagten mindestens einen ersten technologiespezifischen Verfolgungsbereich (215) und dem besagten mirtdestens einen zweiten technologiespezifischen Verfolgungsbereich (225);
    Ermitteln, in Reaktion auf das Erfassen des Übergangs, einer Standortaktualisierungsfrequenz, welche die Frequenz der Übergänge der mobilen Einheit (230) zwischen dem besagten mindestens eine ersten technologiespezifischen Verfolgungsbereich (215) und dem besagten mindestens einen zweiten technologiespezifischen Verfolgungsbereich (225) angibt; und
    Zuordnen der mobilen Einheit (230) zu einem gemeinsamen Verfolgungsbereich (255) auf der Basis der Standortaktualisierungsfrequenz, wobei der gemeinsame Verfolgungsbereich (255) mindestens eine erste Basisstation (205) und mindestens eine zweite Basisstation (210) einschließt, wobei die mobile Einheit die Standortaktualisierungsfrequenz ermittelt, wobei die mobile Einheit die Zuordnung zu dem gemeinsamen Verfolgungsbereich anfordert, wenn die Standortaktualisierungsfrequenz einen ausgewählten Grenzwert überschreitet, und wobei das Zuordnen der mobilen Einheit zu dem gemeinsamen Verfolgungsbereich das Zuordnen der mobilen Einheit zu dem gemeinsamen Verfolgungsbereich in Reaktion auf die Anforderung umfasst.
  2. Verfahren nach Anspruch 1, wobei die mobile Einheit den gemeinsamen Verfolgungsbereich auswählt.
  3. Verfahren nach Anspruch 1, wobei das Zuordnen der mobilen Einheit zu dem gemeinsamen Verfolgungsbereich das Zuordnet der mobilen Einheit zu dem gemeinsamen Verfolgungsbereich an einem mit mindestens einem den gemeinsamen Verfolgungsbereich bedienenden Netzwerk assoziierten Knoten umfasst.
  4. Verfahren nach Anspruch 1, wobei das Zuordnen der mobilen Einheit das Zuordnen der mobilen Einheit zu dem gemeinsamen Verfolgungsbereich derart, dass die Paging-Nachrichten über die besagte mindestens eine erste Basisstation oder die besagte mindestens eine zweite Basisstation, die sich in dem gemeinsamen Verfolgungsbereich befinden, an die mobile Einheit bereitgestellt werden, umfasst.
  5. Verfahren nach Anspruch 1, wobei das Zuordnen der mobilen Einheit zu dem gemeinsamen Verfolgungsbereich das erneute Zuordnen der mobilen Einheit zu dem technologiespezifischen Verfolgungsbereich auf der Basis eines Timers, welcher neu gestartet wird, wenn ein Technologiewechsel erfolgt, und mit der Vorwärtszählung (oder Rückwärtszählung) fortfährt, wenn keine Technologieänderung erfolgt, umfasst, und das Initiieren des Timers in Reaktion auf das Auswählen des gemeinsamen Verfolgungsbereichs und das erneute Zuordnen der mobilen Einheit zu entweder dem ersten technologiespezifischen Verfolgungsbereich oder dem zweiten technologiespezifischen Verfolgungsbereich nach einer von dem Timer angegebenen vorbestimmten Dauer umfasst.
  6. Verfahren nach Anspruch 1, umfassend das Ermitteln einer Anzahl von Übergängen zwischen technologiespezifischen Verfolgungsbereichen, nachdem die mobile Einheit dem gemeinsamen Verfolgungsbereich zugeordnet wurde, weiterhin umfassend das Erhalten der Zuordnung der mobilen Einheit zu dem gemeinsamen Verfolgungsbereich in Realtion auf das Ermitteln, dass die Anzahl der Übergänge zwischen technologiespezifischen Verfolgungsbereichen, nachdem die mobile Einheit dem gemeinsamen Verfolgungsbereich zugeordnet wurde, einen vorbestimmten Grenzwert überschreitet.
  7. Mobile Einheit, konfiguriert für die drahtlose Kommunikation mit einem drahtlosen Kommunikationssystem, welches erste Basisstationen, die gemäß einer ersten Technologie betrieben werden und mindestens einen ersten technologiespezifischen Verfolgungsbereich zugeordnet sind, und zweite Basisstationen, die gemäß einer zweiten Technologie, welche sich von der ersten Technologie unterscheiden, betrieben werden und mindestens einem zweiten technologiespezifischen Verfolgungsbereich zugeordnet sind, einschließt, wobei die mobile Einheit für das Durchführen der folgenden Schritte konfiguriert ist:
    - Erfassen eines Übergangs der mobilen Einheit zwischen dem besagten mindestens eignen ersten technologiespezifischen Verfolgungsbereich und dem besagten mindesten einen zweiten technologiespezifischen Verfolgungsbereich;
    - Ermitteln, in Reaktion auf das Erfassen des Übergangs, einer Standortaktualisierungsfrequenz, welche eine Frequenz der Übergänge der mobilen Einheit zwischen dem besagten mindestens einen ersten technologiespezifischen Verfolgungsbereich und dem besagtem mindestens einen zweiten technologiespezifischen Verfolgungsbereich angibt; und
    - Anfordern der Zuordnung zu einem gemeinsamen Verfolgungsbereich auf der Basis der Standortaktualisierungsfrequenz, wobei der gemeinsame Verfolgungsbereich mindestens eine erste Basisstation und mindestens eine zweite Basisstation einschließt, wobei die mobile Einheit für das Anfordern der Zuordnung zu dem gemeinsamen Verfolgungsbereich, wenn die Standortaktualisierungsfrequenz einen ausgewählten Grenzwert überschreitet, konfiguriert ist.
  8. Mobile Einheit nach Anspruch 7, wobei die mobile Einheit für das Ermitteln der Standortaktuaiisierungsfrequenz durch Initiieren eines Timers in Reaktion auf das Erfassen des Übergangs zwischen dem besagten mindestens einen ersten technologie spezifischen Verfolgungsbereich und dem besagten mindestens einen zweiten technologiespezifischen Verfolgungsbereich konfiguriert ist.
  9. Mobile Einheit nach Anspruch 8, wobei die mobile Einheit für das Ermitteln einer Anzahl der von der mobilen Einheit übertragenen Standortaktualisierungen in Reaktion auf Übergänge zwischen dem besagten mindestens einen ersten technologiespezifischen Verfolgungsbereich und dem besagten mindestens einen zweiten technologiespezifischen Verfolgungsbereich während einer von dem Timer angegebenen Zeitspanne konfiguriert ist.
  10. Mobile Einheit nach Anspruch 7, wobei die mobile Einheit für das Auswählen des gemeinsamen Verfolgungsbereichs konfiguriert ist.
  11. Mobile Einheit nach Anspruch 7, wobei die mobile Einheit für das Ermitteln einer Anzahl von Übergängen zwischen technologiespezifischen Verfolgungsbereichen, nachdem die mobile Einheit dem in der Zuordnungsanforderung angegebenen gemeinsamen Verfolgungsbereich zugeordnet wurde, konfiguriert ist.
EP07753154.9A 2006-03-28 2007-03-14 Verfahren für die zuweisung einer mobilen einheit eines verfolgungsbereichs auf der basis einer standortaktualiserungsfrequenz Not-in-force EP1999984B1 (de)

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US11/390,995 US8068846B2 (en) 2006-03-28 2006-03-28 Method of assigning a mobile unit to a tracking area based on a location update frequency
PCT/US2007/006505 WO2007126595A1 (en) 2006-03-28 2007-03-14 Method of assigning a mobile unit of a tracking area based on a location update frequency

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CN101411218B (zh) 2013-01-02
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RU2441348C2 (ru) 2012-01-27
KR101406769B1 (ko) 2014-06-12
CN101411218A (zh) 2009-04-15
KR20080113374A (ko) 2008-12-30
US8417247B2 (en) 2013-04-09
CN102711237B (zh) 2016-12-14
CN102711237A (zh) 2012-10-03
JP2009531970A (ja) 2009-09-03
AU2007243839A1 (en) 2007-11-08
US8068846B2 (en) 2011-11-29
US20070232320A1 (en) 2007-10-04
WO2007126595A1 (en) 2007-11-08
JP5232136B2 (ja) 2013-07-10
US20120028647A1 (en) 2012-02-02
TW200808084A (en) 2008-02-01
RU2008142364A (ru) 2010-05-10
PL1999984T3 (pl) 2013-11-29
BRPI0709123A2 (pt) 2011-06-28
AU2007243839B2 (en) 2010-09-23

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